This just got in my mind. Lately there have been many sequels to anime series like Haruhi (2nd season sometime late 2008), Zero no Tsukaima (3rd season announced but no date yet), Genshiken (2nd season Fall 2007), Shakugan no Shana (2nd season Fall 2007), Sayonara Zetsubou Sensei (2nd season Winter 2007), Code Geass, Mushi-Uta etc etc…